Patent US5075674A successfully refreshed from Google Patents.
Patent US2779753A successfully refreshed from Google Patents.
US2779753A
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Process for preparing high molecular polymers from isobutylene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-12-29
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Granted: 1957-01-29
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Expires: 1972-12-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Garabrant
- 👤 Helmuth G Schneider
- 👤 Hans G Goering
- 👤 Henry O Mottern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:23
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR PRODUCING IMPRAOVED POLYISOBUTYLENE WHICH COMPRISES POLYMERIZING ISOBUTYLENE INTO POLYISOBUTYLENE AT A TEMPERATURE BETWEEN ABOUT -58*F. TO +104*F. WITH A NON-COMPLEXED ALUMINUM CHLORIDE CATALYST HAVING A PARTICLE SIZE OF LESS THAN ABOUT 0.2 MM. IN THE PRESENCE OF ABOUT 25-95% BASED ON TOTAL FEED OF AN INERT NORMALLY LIQUID C5-C8 ALKANE HYDROCARBON POLYMER SOLVENT UNTIL A POLYMER OF IMPROVED SHEAR STABILITY AND ELEVATED MOLECULAR WEIGHT IS OBTAINED WITH SUBSTANTIALLY NO FOULING OF THE DISSOLVED PRODUCT BY POLYMER PRECIPITATION.
Claim 2
Dependent Claim
80 words
A PROCESS FOR PRODUCING IMPRAOVED POLYISOBUTYLENE WHICH COMPRISES POLYMERIZING ISOBUTYLENE INTO POLYISOBUTYLENE AT A TEMPERATURE BETWEEN ABOUT -58*F. TO +104*F. WITH A NON-COMPLEXED ALUMINUM CHLORIDE CATALYST HAVING A PARTICLE SIZE OF LESS THAN ABOUT 0.2 MM. IN THE PRESENCE OF ABOUT 25-95% BASED ON TOTAL FEED OF AN INERT NORMALLY LIQUID C5-C8 ALKANE HYDROCARBON POLYMER SOLVENT UNTIL A POLYMER OF IMPROVED SHEAR STABILITY AND ELEVATED MOLECULAR WEIGHT IS OBTAINED WITH SUBSTANTIALLY NO FOULING OF THE DISSOLVED PRODUCT BY POLYMER PRECIPITATION.
References Cited (Backward Citations)
US2400129A
Cited
US2681903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |